removing submodule

depends/rpi-rgb-led-matrix/bindings/c#/examples/Rotating3DCube/Program.cs

@@ -0,0 +1,90 @@
+using RPiRgbLEDMatrix;
+using System.Numerics;
+
+const float MaxModuleSpeed = 0.1f;
+const float FOV = 60f;
+const float Scale = 1.1f;
+const float LerpPow = 0.002f;
+const int ChangePerFrames = 50;
+
+using var leds = new RGBLedMatrix(32, 1, 1);
+var canvas = leds.CreateOffscreenCanvas();
+
+var (centerX, centerY) = (canvas.Width / 2, canvas.Height / 2);
+
+var rnd = new Random();
+var angleSpeed = new Vector3();
+var nextAngleSpeed = new Vector3();
+var frame = -1;
+
+var rotateMatrix = Matrix4x4.Identity;
+var scaleMatrix = Matrix4x4.CreateScale(Scale);
+var projectMatrix = Matrix4x4.CreatePerspectiveFieldOfView(FOV / 180 * MathF.PI, 1, 0.1f, 100f);
+var cameraMatrix = Matrix4x4.CreateLookAt(new(0, 0, 4), new(0, 0, 0), new(0, 1, 0));
+
+// run until user presses Ctrl+C
+var running = true;
+Console.CancelKeyPress += (_, e) =>
+{
+    running = false;
+    e.Cancel = true; // do not terminate program with Ctrl+C, we need to dispose
+};
+while (running)
+{
+    var frameStart = Environment.TickCount64;
+
+    // update angle speed
+    frame = (frame + 1) % ChangePerFrames;
+    if(frame == 0)
+        nextAngleSpeed = new Vector3(
+            (rnd.NextSingle() * 2 - 1) * MaxModuleSpeed,
+            (rnd.NextSingle() * 2 - 1) * MaxModuleSpeed,
+            (rnd.NextSingle() * 2 - 1) * MaxModuleSpeed
+        );
+
+    angleSpeed = Vector3.Lerp(angleSpeed, nextAngleSpeed, LerpPow);
+
+    // update matrices
+    rotateMatrix *= Matrix4x4.CreateRotationX(angleSpeed.X);
+    rotateMatrix *= Matrix4x4.CreateRotationY(angleSpeed.Y);
+    rotateMatrix *= Matrix4x4.CreateRotationZ(angleSpeed.Z);
+    var matrix = scaleMatrix * rotateMatrix * cameraMatrix * projectMatrix;
+
+    // calculate points
+    var top1 = Vector4.Transform(new Vector3( 1,  1,  1), matrix);
+    var top2 = Vector4.Transform(new Vector3(-1,  1,  1), matrix);
+    var top3 = Vector4.Transform(new Vector3(-1,  1, -1), matrix);
+    var top4 = Vector4.Transform(new Vector3( 1,  1, -1), matrix);
+
+    var bot1 = Vector4.Transform(new Vector3( 1, -1,  1), matrix);
+    var bot2 = Vector4.Transform(new Vector3(-1, -1,  1), matrix);
+    var bot3 = Vector4.Transform(new Vector3(-1, -1, -1), matrix);
+    var bot4 = Vector4.Transform(new Vector3( 1, -1, -1), matrix);
+
+    // draw
+    canvas.Fill(new(0, 0, 0));
+    DrawLine(top1, top2);
+    DrawLine(top2, top3);
+    DrawLine(top3, top4);
+    DrawLine(top4, top1);
+
+    DrawLine(bot1, bot2);
+    DrawLine(bot2, bot3);
+    DrawLine(bot3, bot4);
+    DrawLine(bot4, bot1);
+
+    DrawLine(top1, bot1);
+    DrawLine(top2, bot2);
+    DrawLine(top3, bot3);
+    DrawLine(top4, bot4);
+
+    leds.SwapOnVsync(canvas);
+    // force 30 FPS
+    var elapsed = Environment.TickCount64 - frameStart;
+    if (elapsed < 33) Thread.Sleep(33 - (int)elapsed);
+}
+
+void DrawLine(Vector4 a, Vector4 b) => canvas.DrawLine(
+    (int)(a.X * a.W + centerX), (int)(a.Y * a.W + centerY),
+    (int)(b.X * b.W + centerX), (int)(b.Y * b.W + centerY),
+    new(255, 255, 255));

depends/rpi-rgb-led-matrix/bindings/c#/examples/Rotating3DCube/Rotating3DCube.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+	<PropertyGroup>
+		<OutputType>Exe</OutputType>
+		<TargetFramework>net6.0</TargetFramework>
+		<ImplicitUsings>enable</ImplicitUsings>
+		<Nullable>enable</Nullable>
+	</PropertyGroup>
+    <ItemGroup>
+        <ProjectReference Include="..\..\RPiRgbLEDMatrix.csproj"/>
+    </ItemGroup>
+</Project>